<template>
  <div class="app">
    <h3>我是App组件</h3>
    <Child/> 
  </div>
</template>

<script>
import Child from './components/Child.vue'

  export default {
    name:'App',
    components:{Child},
  }
</script>

<style>
  .app {
    background-color: gray;
    padding: 10px;
}

</style>